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Table 6 Evidence of internal consistency

From: The World Health Organization Quality of Life instrument for people with intellectual and physical disabilities (WHOQOL-Dis): evidence of validity of the Brazilian version

Domain/factor Cronbach alpha No. of items
PD (n = 162) ID (n = 156)
Domain 1: Physical(a) .839 .566 7
Domain 2: Psychological(a) .745 .565 6
Domain 3: Social(a) .663 .423 3
Domain 4: Environment(a) .722 .673 8
WHOQOL-Bref .898 .840 26
Factor 1(b) .441 .493 3
Factor 2(b) .757 .588 3
Factor 3(b) .746 .685 6
Factor 4(c) .760 .690 12
DISQOL module .771 .692 13
WHOQOL-Dis(d) .910 .858 37
  1. (a)WHOQOL-Bref. (b)DISQOL module: factors consistent with those identified in the original cross-cultural project (global sample). (c)Single factor suggested by the coordinating centre (POWER et al., [12]) as an alternative solution to the DISQOL module. (d)WHOQOL-Bref + DISQOL module.